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Metals and Materials International

, Volume 25, Issue 3, pp 723–732 | Cite as

On the Densification Kinetics of Metallic Powders Under Hot Uniaxial Pressing

  • J. M. Montes
  • F. G. Cuevas
  • J. Cintas
  • F. TerneroEmail author
  • E. S. Caballero
Article
  • 37 Downloads

Abstract

A new model undertaking the densification kinetics of uniaxially pressed metallic powders at constant temperature is proposed. This model is developed according to the power law of creep, and the expression of the ‘net pressure’ derived by the authors in a previous work. This net pressure describes the ‘geometrical hardening’ experienced by the powder mass, during compression. In order to validated the model three different powders were uniaxially pressed, aluminium, tin and lead, being obtained data from hot compaction experiments. The similarity between the model predicted curves and the experimental data is quite acceptable. In addition, the goodness of the model is contrasted with two other theoretical models addressing the same problem. The approach developed can be useful to model hot uniaxial pressing and electrical consolidation processes, which start with loose powders, i.e., not previously cold compacted powders.

Keywords

Densification creep Modelling Metal powders FAST 

Notes

Acknowledgements

The authors grateful to FEDER/MEyC, Madrid, for funding this research within the framework of Projects DPI2015-69550-C2-1-P and DPI2015-69550-C2-2-P. The authors also wish to thank the technicians J. Pinto, M. Madrid and M. Sanchez for experimental assistance.

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Copyright information

© The Korean Institute of Metals and Materials 2018

Authors and Affiliations

  1. 1.Department of Mechanical and Materials EngineeringEscuela Técnica Superior de Ingeniería, Universidad de SevillaSevilleSpain
  2. 2.Department of Chemical Engineering, Physical Chemistry and Materials ScienceEscuela Técnica Superior de Ingeniería, Universidad de HuelvaHuelvaSpain

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